Holy shit, really? That's messed up.
They're also sending text messages and addressing me by full first/last name and asking me to click some sketchy link.
Were you one of the allegedly only 9.500 users who had their full personal details leaked? Did you receive an email from Ledger informing you that you had all your details leaked?
I received only two emails so far, at the beginning of the phishing campaign. They both contain only the first name, not the last name. And there haven't been any calls or SMS messages. Which means they are either using different ways to approach the users, or not everyone has had everything leaked. A third option is that they haven't had time to call yet, due to the share number of other users above me on the list.
Various phone carriers have this feature. Essentially they register their phone number under the name "Ledger" with their carrier, and then the carrier pushes that to your device whenever you receive a call or text from them.
Unless the hackers used fake IDs when registering the phone numbers (which they probably did), the carriers could help in identifying the users behind those numbers. To the police or government agencies, of course, not to the general public.